To make it really easy just add the height of the vehicle you mean to lift and how high you want the tires to come off the ground. Then add about a foot to make up for the suspension droop when you raise it. I think the height of the vehicle is the limiting factor more often than the height of the lift.
They make them for about any height ceiling,just check with your local shop equipment dealer. They should get you a lift that will just clear your ceiling. I just bought one for my shop with 10ft ceilings and clearance is about 6".
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!